Virginia's Declaration of Rights was drawn upon by Thomas Jefferson for the opening paragraphs of the Declaration of Independence. It was widely copied by the other colonies and became the basis of the Bill of Rights.
The ridges found in flexible metal duct create turbulence and will diminish airflow. NEVER use 4 dryer duct or any plastic duct on a range hood installation. The minimum size duct allowed on most range hoods is 3 Â¼ by 10 which is equivalent to 6 round. More powerful hoods require even larger duct sizes up to 10 round. Consult the specifications for the model you have chosen.
The overhang is 18 inches, the bar behind is 18 inches. The back counter is 12 and the sink area is 24 (I think without running back down to measure again, as I forgot). That leaves us 34 inches between the back and front and 6 feet long from opening to sink. It is plenty of space for one or two people behind it.